The list of actors with voluminous credentials includes Richard Harris, as Albus Dumbledore, headmaster of Hogwarts; Zoe Wanamaker as Madame Hooch, the Quidditch coach and flying instructor; comedian John Cleese as Nearly Headless Nick; the marvelous Robbie Coltrane as Hogwarts' lovable, bumbling giant and groundskeeper, Rubeus Hagrid; John Hurt ("The Elephant Man") as the wand seller, Mr. Ollivander; Dame Maggie Smith, an Oscar winner for her role as a teacher at a Scottish girls' school in "The Prime of Miss Jean Brodie," as Professor Minerva McGonagall; and Alan Rickman ("Truly, Madly, Deeply"), who appears as the creepy professor of potions, Severus Snape.